Boiler and furnace



2 Sheets-Sheet'l.

(No Model.)

J. H; MAOKINTOSH.

BOILER AND FURNACE.

Patented Dec. 26, 1882.

INVENTOR M? WITNESSES:

2 $07M40Mf/ ATTORNEYS.

N, PHERS. min-lithograph". Wilhirlgion, B. C.

(No Model.) 2 SheetQ-Sheec 2.

J. H. MAGKINTOSH BOILER AND FURNACE. No. 269,690. Patented Dec. 26, 1882.

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WITNESSES W BY M f" QTTORNBYS.

N. PETERS. Phnmumv u w. Wnhingtan, D. c.

UNITED STATES PATENT @FFICE.

JAMES H. MAOKINTOSH, OF PATERSON, NEW JERSEY.

BOILER AND FURNACE.

SPECIFICATION forming part of Letters Patent No. 269,690, dated December 26, 1882.

Application filed April 26, 1882.

(No model.)

Be it known thatI, James H. MACKINTOSH, of Paterson, in the county of Passaic and State of New Jersey, have invented a new and useful Improvement in Boilers and Furnaces, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1, Sheet 1, is a sectional side elevation of my improvement. Fig. 2, Sheet 2, is'a sectional plan view of the same, taken through the broken line 00 a: w x or, Fig. 1. Fig. 3, Sheet 2, is a sectional side elevation of a part of the same, taken through the line 3 3 Fig. 2. Fig. 4, Sheet 2, is a front elevation of one of the supporting-brackets. Fig. 5, Sheet'Z, is a sectional elevation of a part of the improvement, taken through the line 2 2, Fig. 2.

' The object of this invention is to economize space and fuel in the construction and" use of boilers and furnaces, and at the same time promote efficiency in the operation of said boilers and furnaces.

The invention consists in a boiler and furnace constructed with three (more or less) concentric annular water-chambers connected by pipes, divided into compartments bypartitions, and having enlarged lower ends. The waterchambers are supported upon a base, are inclosed with a casing, and are provided with a central coal-reservoir and two tire-pots, as will be hereinafter fully described.

A represents the base of the boiler and furnace, which is provided with a fire-grate, B, an ash-pan, O, and openings D to admit air to support combustion, the said openings being provided with dampers in the ordinary manner for regulating the draft.

To the outer part of the top of the base A is attached the lower edge of the outer case or shell, E, which has a cap or top, F, attached to its upper edge.

Within the shell or case E is placed an annular chamber, G, the upper part of the inner wall of which is flared outward, and is bolted at its upper edge to the upper edge of the outer wall of the said chamber G. The walls of the chamber G are bolted together at their lower edge, and in the said walls, just above their lower edges, are formed outward bulges forming an annular enlargement, H, in the lowerpart of the said chamber G. The chamber G is divided into two equal compartment-s by partitions I, extending from the top of the said chamber down to the enlargement H. Water is introduced into the upper part of one of the compartments of the chamber G, midway between the partitions I, through the inlet-pipe J, which passes in through the casing E and through the outer wall of the said chamber. The inflowing water passes below the lower ends of the partitions I through the enlargement H, rises through the other compartment of the said chamber, and flows through a pipe, 7:, from the upper part ofthe said chamber G into the annular chamber L, which is concentric with the said chamber G. The lower edge of the chamber G rests upon studs M, attached to the base A.

The chamber L is made smaller and shorter than the chamber G, has an enlargement, N, in its lower part, has the upper part of its inner wall flared outward, and is divided into two equal compartments by partitions O, placed at the distance ofa quarter of a circle from the inlet-pipe K, and extending from the top of the said chamber L down to the enlargement N. WVith this construction the water that enters the chamber L passesdown through the first compartment. of the said chamber through the enlargement N, beneath the lower ends of partitions O, rises through the other compartment of the said chamber L, and flows through the pipe P into the chamber Q, placedconcentric with the chambers L and G and made shorter than the chamber L. The upper part of the outer wall of the chamber Q, is bent inward, and its upper edge is secured to the inner wall. The lower part of the outer wall of the chamber Q is made with an outward bulge forming an enlargement, R, and its lower edge is secured to the lower edge of the inner wall. The enlargements of the water-chambers G L Q allow their walls to expand without lengthening the said chambers, and thus prevent the various parts of the boiler and iuruace from being atTected by the said expansion of the said walls. The inner wall of the chamber Q is made cylindri- ICO upper end of the coal-reservoir S is closed with a cover, '1.

The chamber Q is divided into two equal cotnpartments by partitions 1), extending from the top of the said chamber down to the enlargement B, so that the water in its passage through the said chamber must pass beneath the lower edges of the partitions b.

From the upper part of the chamber Q a pipe U leads out through the top F, or through the casings E below the said top, for the escape of the water and steam, so as to keep up a circulation through the chambers G L Q.

The pipes K P are each formed of two short pipes placed end to end, and having right and lelt screw-tln'eads cut upon them to receive the right and left screw-threads of the tubular nuts K P, screwed upon them, so that the several chambers can be readily connected and disconnected when required.

To the upper part of the chamber Q, or to the reservoir S just above the said chamber Q, are attached brackets 01' studs V, which rest upon the inclined top of the chamber L, so that the chamber Q will be supported from the said chamber L.

To the top of the chamber L are attached studs or brackets \V, which rest upon the inclined top of the chamber Gr, so that the chambers L and Q will be supported by the said chamber G.

X is the fire-pot, the upper part of which is flared outward to fit and rest upon the upper side of the inner part of the enlargement H. The fire-pot X is made in two parts, so that it can be readily put in and taken out.

Y is a second and smaller fire-pot, which is also made with a flaring upper part to rest upon the inner part of the enlargetnent N and protect it from the fire. The fire-pot Y is made lll two parts, so that it can be readily put in and taken out. With this construction the heated products of combustion and the heated air that passes up around theIire-pot X pass up through the spaces between the water-chamhers and between the outer chamber and the outside easing, E, into the space below the top I and escape thence through the pipe Z into the chimney-flue. With this construction the water is made to circulate through the boiler in thin sheets, which are exposed upon both sides to a heating-surface, so that the said water will be very quickly heated.

In the upper ends of the partitions I O b are formed small openings (1, through which any air that may collect in the upper parts of the chambers G L Q can pass from one of the said chambers to another, and can escape through the water inlet or outlet passages.

Having thus described my invention, I claim as newand desire to secure by Letters Patent- 1. A boiler and furnace constructed substantially as herein shown and described, and consisting of three (more or less) concentric annular water-chambers, G L Q, divided into compartments by partitions I O b, having enlargements H N It at their lower ends, and connected by pipes K P, the outer casing, E

F, the base A, and the fire-pots X Y, as set forth.

2. In a boiler and furnace, the combination, with the casing E, the top I and the base A, of the concentric annular water-chamber G L Q, the tire-pot X, and second or upper tire-pot, Y, substantially as shown at d described, whereby both sides of the water-c amber will be exposed to the heated products of combustion, as set forth.

3. In a boiler and furnace, the annular concentric water-chambers G L Q, made with enlargements at their lower ends, substantially as herein shown and described, whereby the walls of the said chambers can expand without lengthening thetn, as set forth.

4. In a boiler and furnace, the combination, with the enlargement H of the annular waterchamber G, of the tire-pot X, made in two parts, and with a flaring upper part, substantially as herein shown and described, whereby the said fire-pot can be readily put in and takett out and will be firmly supported, as set forth.

5. In a boiler and furnace, the combination, with the enlargement- N of the intermediate annular water-cham ber, L, the fire-box X, and the coal-reservoir S, of the second fire-pot, Y, substantially as herein shown and described, whereby the said enlargement is protected from the tire, as set forth.

. 6. In a boiler and furnace, the combination, with the upper ends of the concentric annular water-chambers G L Q, of the brackets V W, substantially as herein shown and described, whereby each inner water-chamber will be supported by the next outer chamber, as set forth.

JAMES H. MACKlNTOSH.

W'itnesses:

JAMES T. GRAHAM, 0. SEDGWIOK. 

